Printing-press



G. C. HOWARD.

PRINTING PRESS.

No. 28,664.. Patented June zs, 1860.

A w W? UNITED STATES PATENT OFFICE.

GEORGE O. HOWARD, OF PHILADELPHIA, PENNSYLVANIA.

PRINTING-PRESS.

Specification of Letters Patent No. 28,864, dated June 26, 1860.

T 0 all whom 'it may concern:

Be it known that I, GEORGE O. HOWARD, of Philadelphia, State of Pennsylvania, have made new and useful Improvements in Plate-Printing Presses; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the annexed drawing, making a part of this specification, in which Figure 1 is a top view of the press. 2 is a perspective view of the same.

The object of my invention is to cause the press to stop itself after the impression. The apparatus is also so arranged that it is impossible to start it, in the wrong direction.

The nature of my invention consists, first,

Fig.

in connecting the plate or table A by suitable mechanism with the belt shifter rod B B, so that at the proper moment the machine will stop itself; second, in connecting the shifter rod with treadles or their equivalents so that the press may be started in the right direction.

In the drawings, A is the plate or table upon which the copper or steel plate is placed.

C is the impression roller.

D is the belt shifter; B B, the belt shifter rod.

E and G are loose pulleys.

F is a tight pulley.

H H are the treadles.

I will first describe the mode of connection between the plate A and the shifter rod B B. A sliding rod L is placed immediately beneath the plate A. Upon one side of each end of the plate are placed cams or pins M. On the sliding rod are placed two pins so arranged that according as one or the other of the cams M presses against either of them, the rod L will be slid one way or the other. This rod L is connected by a lever N of any form with the shifter rod B B. The treadles H H are connected by rods 0, O or their equivalents with the shifter rod B B.

The operation of this machine is as follows: The copper-plate is placed on the plate A at its center. The operator then by pressing his foot upon the treadle H (which is upon the side he'stands while arranging the paper upon the plate,) the shifter rod is caused to move in the direction of the arrow 1 and the belt, which has been running on the loose pulley E is thrown upon the tight pulley. As the plate A passes over toward the op osite side the cam M pushes against the sliding rod L, which in its turn causes the shifter rod B B to be moved in the direction of the arrow 2 and throws the belt upon the loose pulley. Now by pressing the foot upon the treadle H (supposing the plate to be on the side opposite to that on which it is in the drawings) the machine cannot be started, because being connected with the sliding rod L it would be necessary to move this rod in the direction of the arrow 3, which is impossible as it rests against the cam. But by pressing the foot upon the treadle H, the shifter rod is moved in the direction of the arrow 2 and the band which has been running on the loose pulley G is brought upon the tight pulley F, and the machine is moved in the reverse direction. NVhen the plate has passed under the impression roller the other cam stops the machine as before.

It should be observed that the bands on the two loose pulleys E and G are running in opposite directions and that the tight pulley is connected with the shaft of the press.

The advantage of connecting the apparatus for stopping the machine and treadles, together as described, is that the machine can never be started in the wrong direction, no matter how careless the operator might be. Instead of using the treadles H H a horizontal lever P, connected with the shifter rod B B, might be used, and this from the fact of its being connected with the rod L can be moved in no direction but the proper one, as stated of the treadles H H.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

The combination of the plate A the sliding rod L, the shifter rod B B and the treadles H H or their equivalents, the whole being connected by levers or their equivalents, and so arranged that the machine cannot be started in the wrong direc tion, substantially as above described.

GEO. O. HOWARD.

Witnesses:

J. G. MINI CHILD, GEORGE CRUMP. 

